i have been trying to fix my brightness issue on my macbookpro 7.1 running snow leopard tried almost all suggestions. but nothing worked. tried modifying xorg.conf but it tells me i dont have permission to do so. tried different drivers and reinstalling the unit and nothing seemed to work.
if anyone can put me out of my misery i will be so happy :) im literally spending my second week trying to fix this.
i downgraded from 12.10 hoping that this issue would have been fixed in a lower update :(